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“The central Stinger conical diamond element allows our customers to drill at higher ROPs by improving cutting action in a wide range of formations, reducing both drilling hours and the number of bits used in each well,” said Guy Arrington, president, Bits & Advanced Technologies, Schlumberger. “The first application of Stinger technology also delivers a more stable bit with less vibration to reduce stress on drillstring components and improve the reliability of downhole tools.”

Using the IDEAS* integrated drillbit design platform, extensive simulations were conducted showing ROP increases in a range of different rock types, including shale, limestone and sandstone. The virtual drilling environment demonstrated central Stinger element placement would yield an ROP increase of at least 18%.

In the Williston Basin, an 8 ¾-in PDC bit is typically used to drill the vertical hole before the curve and lateral section in the Bakken oil-bearing sands. In field tests, centrally placed Stinger element technology was added to the baseline vertical section drillbit design. Average ROP was increased by more than 46% when compared to the next best performance in offset wells, with a record ROP increase of 77%.

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Schlumberger Limited has principal offices in Paris, Houston and The Hague and reported revenues of $42.15 billion in 2012. For more information, visit www.slb.com.